Long-term management of sustained, recurrent, symptomatic ventricular tachycardia with amiodarone.
Twenty-three patients with sustained, recurrent, symptomatic ventricular tachycardia were treated with oral amiodarone. Initial doses were 600-2000 mg/day and maintenance doses were 200-1200 mg/day. Amiodarone was highly effective in 20 patients (87%), seven of whom had a follow-up of 30 months or longer, including two who were followed for 5 years. Three patients died within the first 45 days, three died suddenly after a follow-up of 33.5 months, and four had a nonarrhythmic death after a follow-up of 25 months. Fifteen patients (65%) had no recurrence during a follow-up of 21.5 months, while five (22%) had isolated recurrences during a follow-up of 32.2 months. The average maintenance dose was 713 mg/day in the 15 patients who did not have recurrences and 375 mg/day in the five patients who had recurrences (p less than 0.001). Both short- and long-term tolerance were excellent and there was not a single case in which treatment had to be discontinued. The main disadvantage of amiodarone was that it took an average of 9.5 days to reach anti-arrhythmic efficacy. The main advantages were prolonged duration of action (recurrences occurred only 15-60 days after the drug was discontinued or the dose lowered, virtual absence of contraindications, doses as high as 2000 mg/day were safe and patient compliance was excellent.
D000328:Adult; D000368:Aged; D000638:Amiodarone / Q000009:adverse effects / Q000627:therapeutic use*; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001572:Benzofurans / Q000627:therapeutic use*; D003316:Corneal Diseases / Q000139:chemically induced; D006801:Humans; D008134:Long-Term Care; D008297:Male; D008875:Middle Aged; D010787:Photosensitivity Disorders / Q000139:chemically induced; D012008:Recurrence; D012871:Skin Diseases / Q000139:chemically induced; D013610:Tachycardia / Q000188:drug therapy* / Q000401:mortality; D013997:Time Factors
D000889:Anti-Arrhythmia Agents; D001572:Benzofurans; D000638:Amiodarone